Read and update more info from/to issues

This pull request add the next features:

- [ ] Allows to set the issue labels with a coma list `label1,label2,label3`
- [ ] Allows to change the issue `assignee`
- [ ] Allows to change the issue `milestone`
- [ ] Allows to use `-n` when listing issues `gh is --list -n NUMBER` so you can get one issue info
- [ ] Add the labels info to the `--detailed` issue template
- [ ] Add the milestone info to the `--detailed` issue template